/tx/history : duplicate entries
There is deuplicate entries in the history function.
Example : http://metab.ucoin.io:9201/tx/history/D3DGfBJdKvc7EVoyAoGLw4ax7wdpAEefXHrvsCjcwnTC/blocks/7303/7303
=> see fingerprint : 2017BBC1C18F39C6183F7E764B5FB14895F5B5FF